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EmEditor 19.8 - Insecure File Permissions

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Ken1Ve

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# Exploit Title: EmEditor 19.8 - Insecure File Permissions
# Date: 2020-04-27
# Exploit Author: SajjadBnd
# Vendor Homepage: https://www.emeditor.com/
# Software Link: https://support.emeditor.com/en/downloads/suggested
# Version: 19.8
# Tested on: Win10 Professional x64

[ Description ]

EmEditor is a fast, lightweight, yet extensible, easy-to-use text editor for Windows.
Both native 64-bit and 32-bit builds are available, and moreover,
the 64-bit includes separate builds for SSE2 (128-bit), AVX-2 (256-bit),
and AVX-512 (512-bit) instruction sets.

[ PoC ]

C:\Users\user\AppData\Local\Programs\EmEditor
λ icacls *.exe

ee128.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

ee256.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

ee512.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

EEAdmin.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

eehlpver.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

eeupdate.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

emedhtml.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

EmEditor.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

emedtray.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

emedws.exe NT AUTHORITY\SYSTEM:(F)
BUILTIN\Administrators:(F)
DESKTOP-K4UDI4I\user:(F)

Successfully processed 10 files; Failed processing 0 files

[ Exploit - Privilege Escalation ]

Replace any *.exe files with any executable
malicious file you want then wait and get SYSTEM or Administrator rights (Privilege Escalation)
- Also you can use DLL Hijacking technique(emonig.dll,emregexp.dll,emtoast.dll..) ;D
            
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